/*
 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package gc.g1.unloading.check.cleanup;

import java.lang.reflect.Method;

/**
 * This utility class helps to finish threads that are not required anymore.
 */
public class UnusedThreadKiller implements CleanupAction {

    private long threadId;

    public UnusedThreadKiller(long threadId) {
        this.threadId = threadId;
    }

    @Override
    public void cleanup() throws Exception {
        for (Thread thread : Thread.getAllStackTraces().keySet()) {
            if (thread.getId() == threadId) {
                for (Method m : thread.getClass().getMethods()) {
                    if ("finishThread".equals(m.getName())) {
                        m.invoke(thread);
                    }
                }
            }
        }
    }
}
